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Home >> Products >> Industrial Specialized Testing >> Light Industry >> Adhesive Sealant Bond Tensile Shear Testing Machine

Adhesive Sealant Bond Tensile Shear Testing Machine

Model: WDW-50Y

Adhesive sealant bond tensile shear testing is a core mechanical performance test method for evaluating the shear resistance of bonded joints formed by adhesives or sealants. It measures the maximum shear load that a unit bonding area can withstand before failure, and analyzes the failure mechanism of the joint, which is a key basis for judging the bonding reliability of adhesives/sealants in engineering applications.

Test principle of adhesive sealant test:

The adhesive test is based on the lap joint shear loading mechanism, and its core logic is as follows:

Specimen Structure: The test uses a lap-shear joint specimen, which is composed of two adherend substrates bonded by a layer of adhesive/sealant. The key dimensions include lap length, bond width, and adhesive layer thickness (strictly controlled to ensure test repeatability).

Loading Mode: The lap-shear specimen is clamped on a universal testing machine, and a uniaxial tensile load is applied along the longitudinal direction of the adherend (parallel to the lap surface). Under this load, the adhesive layer between the two adherends bears pure shear stress (ideally; additional bending stress should be minimized by optimizing the specimen design).

Failure Judgment: The load is continuously applied until the bonded joint is destroyed (either the adhesive layer breaks, the interface between adhesive and adherend separates, or the adherend itself fails).

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General introduction

Test principle of adhesive sealant test:

The adhesive test is based on the lap joint shear loading mechanism, and its core logic is as follows:

1, Specimen Structure: The test uses a lap-shear joint specimen, which is composed of two adherend substrates bonded by a layer of adhesive/sealant. The key dimensions include lap length, bond width, and adhesive layer thickness (strictly controlled to ensure test repeatability).

2, Loading Mode: The lap-shear specimen is clamped on a universal testing machine, and a uniaxial tensile load is applied along the longitudinal direction of the adherend (parallel to the lap surface). Under this load, the adhesive layer between the two adherends bears pure shear stress (ideally; additional bending stress should be minimized by optimizing the specimen design).

3, Failure Judgment: The load is continuously applied until the bonded joint is destroyed (either the adhesive layer breaks, the interface between adhesive and adherend separates, or the adherend itself fails).

4, Calculation: The ultimate shear strength (τ) is calculated using the formula:

τ = P_max / A

where:

τ = Shear Strength (MPa, psi)
P_max = Maximum load at failure (N, lbf)
A = Bonded overlap area (width × length, in mm² or in²)

Key Distinction: It's called "Tensile Shear" because a tensile (pulling) force is applied to the specimen to generate shear stress within the bond. The failure mode is critical and is reported (e.g., cohesive failure within the adhesive, adhesive failure at the interface, or substrate failure).

Key Features

Load frame and driven type
Grip and test fixture
Security function
Control system, Software
Powerful Function Software
Standard
Key Test Notes

Load frame and driven type

Compact construction applies aluminum alloy profile load frame cover structure;

Frame are proof loaded to 200% of capacity, with concentric arrangement of the drive lead screw and crosshead guide which assure high accuracy and strong reliability;

Leading screw AC servo motor

Top and middle crosshead processed through shot blasting & baking paint technology, appearance, no corrosion and no need lubrication oil maintenance.

Adopt Japan Panasonic/FUJI AC servo motor and driving system, ensure transmission and moment of force stable;

Adopt Circular Arc Profile Synchronous Belt Transmission, eliminate dual direction clearance, prolongs the life of synchronous belt;

Multiple load cell in one machine available.

Advanced USA Vishay celtron load cell ensure the force measuring accuracy and repeatability, Overload capacity 150%.

Compatibility concept for continuous component expansion;

Grip and test fixture

Manual, hydraulic, pneumatic tensile test fixture available;

Removable grip-jaws can be changed rapidly to meet variable wider applications in tension test.

Versatile test fixture like peeling, shear, bending, flexure, tear, burst, puncture, compression test for kinds of material;

Security function

Sensor of position limitation switch;

Emergency stop switch;

Hardware driving system overload protection, over voltage, current protection;

Software over load protection.

Control system, Software

Based on full digital STC8800 measuring and control card; Data collection system use 4 channel of high accuracy 24 digit A/D conventer;

Real time load, deformation, corsshead displacement, test precess four kind close loop control;

Resolution can upto 1/500000, full range without step;

Level authorization management function: to improve sftware and data security, can set different password to realize several class authorization management. Different user with different right to operate the machine, avoiding unexpected mistake because human error.

PC control system, with advantage of high integration, reliable performance, easy adjusment etc. can real time collect test data, on-time display test curve, test data file can be saved as ACCESS and SQL server, convenient for customer's data resource storage.

Automatically generate the testing report; the testing report can be displayed and printed, also it can be export in Excel/Access Format. Also, the user can edit the report format as requirement in report template;

Result recall function: after the test and saved, customer can open the test data and re-analysis at any time.

Results compare: observe several curve at same time, can fold curve or portion enlarge to analyze and compare sample characters.

Load~Time, Load~displacement, Displacement~time etc. curve smoothly switch, display test data, save, analysis and print.

Computer Controlled Electronic Universal Testing Machine

Main interface for test and result display

Computer Controlled Electronic Universal Testing Machine

Multiple load cells

Computer Controlled Electronic Universal Testing Machine

Test Report/Batch test report/ Curve superposition for comparison

ISO 4587 -- Adhesives -- Determination of tensile lap-shear strength

ISO 8510 -- Adhesives -- Peel test for a flexible-bonded-to-rigid test specimen assembly

ASTM C273 – Standard Test Method for Shear Properties of Sandwich Core Materials

ASTM C633 – Standard Test Method for Adhesion or Cohesion Strength of Thermal Spray Coatings

ASTM C828 – Tensile Testing of Glazed Ceramic Tile Adhesive Bonds

ASTM D897 – Standard Test Method for Tensile Properties of Adhesive Bonds

ASTM D903 – Peel or Stripping Strength of Adhesive Bonds

ASTM D904 -- Standard Test Method for Comparison of Bond Strength or Ply Adhesion of Similar Laminates Made from Flexible Materials

ASTM D1002 – Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens

ASTM D1781 – Standard Test Method for Climbing Drum Peel for Adhesives

ASTM D1876 – Peel Resistance of Adhesives (T-Peel Test)

ASTM D2095 - Standard Test Method for Tensile Strength of Adhesives by Means of Bar and Rod Specimens

ASTM D3165 -- Standard Test Method for Strength Properties of Adhesives in Shear by Tension Loading

ASTM D3167 – Floating Roller Peel Resistance of Adhesives

ASTM D3330 – Peel Adhesion of Pressure-Sensitive Adhesives

ASTM D3654 -- Standard Test Methods for Shear Adhesion of Pressure Sensitive Tapes

ASTM D3759 – Tensile Strength and Elongation of Pressure-Sensitive Tapes

ASTM D6195 – Standard Test Methods for Loop Tack.

Adhesive Layer Thickness Control: Too thick an adhesive layer will reduce the shear strength, while too thin a layer is easy to cause defects (such as bubbles). ISO and ASTM standards recommend 0.1–0.3 mm.
Adherend Surface Treatment: The surface cleanliness and roughness directly affect the bonding strength. Degreasing (using anhydrous ethanol) and sandblasting (surface roughness Ra 3.2–6.3 μm) are necessary steps for metal adherends.
Loading Rate Consistency: Different loading rates will lead to different test results. The standard specifies 1–5 mm/min, and the same rate must be used for the same batch of tests.
Environmental Condition Standardization: The test should be carried out under standard temperature (23±2℃) and humidity (50±5% RH) unless environmental simulation tests are required.

Main technical specification

Load capacity	10KN / 20KN/ 50KN (0.4%--100%）
Multiple load cell in one machine function	YES
Load Accuracy	Class 0.5 according ISO7500-1
Load cell overload capacity	120~150% of rate capacity
Load measuring resolution	1/500000 FS, stepless
Stiffness of frame	0.024mm/t
Position / displacement resolution	0.001mm
Crosshead travel	1200mm
Tensile test space	700mm
Compression test space	800mm
Effective testing width (Clearance between columns)	500mm
Standard tensile test fixture	Manual wedge type
Wedge tensile fixture Flat specimen range	0-20mm
Wedge tensile fixture Flat specimen range	Φ4-Φ20mm
Compression platen diameter	Φ100mm
Testing speed range	0.001 mm/min～500 mm/min, stepless, adjustable arbitrarily (Optional max. 1000mm/min)
Weight	560kg
Standard Power	220/110V, 50/60HZ, 1 phase
Dimensions	860×600×1950mm
Analysis software	FastTest English version
Working system	MS Win10/ Win11
Frame structure	Standard: Dual test space Optional: Single test space

Specifications:

Load measurement accuracy: +/- 0.5% of applied load from 2% to 100% capacity; extended range down to 1% capacity with accuracy of 1% of applied load

Position measurement accuracy: +/- 0.5% of reading；

Deformation measuring accuracy and measuring range: 2%～100%FS, ≤±0.5%

Speed accuracy: ±1%(0.001~10mm/min),±0.5%(10~500mm/min)

Operating temperature range: 0 to 38 degrees C (32 to 100 degrees F)

Storage temperature range: -10 to 45 degrees C (14 to 115 degrees F)

Humidity range: 10% to 90% non-condensing, wet bulb method

Power: standard optional voltages110/220VAC, 50-60 Hz; power must be free of spikes and surges exceeding 10% of the nominal voltage.

Notes: 1. Load weighing system meets or exceeds the requirements of the following standards: ASTM E4, EN 10002-2, BS 1610, DIN 51221, ISO 7500-1. UNITEDTEST recommends that systems are verified at installation in accordance with ASTM E4 and ISO 75001. 2. Strain measurement system meets or exceeds the requirements of the following standards: ASTM E83, EN 10002-4, BS 3846 and ISO 9513. 3. These models conform to all relevant European CE

Notes: 2. Dual test space structure: Tensile test at upside of crosshead, Compression and bending test at downside of crosshead.

Tensile, Compression and bending test all done at downside of crosshead (the three type test fixture interchange for different test).

Main accessories (Standard delivery with machine)

High Stiffness Frame:	1 set
Servo driving system: Servo motor:	1 set
Loadcell:	1 set
Decelerator and deceleration system	1 set
Leading screw:	1 set
Adhesive test fixture	1 set
Compression test fixture(Φ100mm)	1 set
Professional testing software(SmartTest, English version)	1 set
Bending test fixture	1 set
Computer	1 set
Printer	1 set
Documents (Manual, packing list, certificate)

UNITEDTEST Webbing tensile fixture. Nickle coating.

UNITEDTEST optional 800mm large extension extensometer.

Nickle coating manual wedge tensile fixture

UNITEDTEST manual wedge tensile fixture, upper clamper. Nickle coating.

UNITEDTEST optional 800mm large extension extensometer.

UNITEDTEST manual wedge tensile fixture, lower clamper. Nickle coating.

Standard

ASTM D1781 Peeling Test for Climbing Drum Method for Adhesives –

ASTM D1781: Standard Test Method for Climbing Drum Peel for Adhesives

ASTM D1781 test method covers the determination of the peel resistance of adhesive bonds between: a relatively flexible adherend and a rigid adherend; and the relatively flexible facing of a sandwich structure and its core, when tested under specified conditions.

ASTM D1876 T-Peel Resistance Test of Adhesives –

ASTM D1876: Standard Test Method for Peel Resistance of Adhesives (T-Peel Test)

ASTM D1876 test method is primarily intended for determining the relative peel resistance of adhesive bonds between flexible adherends by means of a T-type specimen using a tension testing machine. The bent, unbonded ends of the test specimen shall be clamped in the test grips of the tension testing machine and a load of a constant head speed shall be applied. An autographic recording of the load versus the head movement or load versus distance peeled shall be made. The peel resistance over a specified length of the bond line after the initial peak shall be determined.

ASTM D3167 Peel Resistance Adhesives Test - Floating Roller –

ASTM D3167 Peel Resistance Adhesives Test - Floating Roller

ASTM D3167 Floating Roller Peeling test method covers the determination of the relative peel resistance of adhesive bonds between one rigid adherend and one flexible adherend when tested under specified conditions of preparation and testing.

ASTM D5041 Adhesives Splitting Shear Strength Test –

ASTM D5041: Standard Test Method for Fracture Strength in Cleavage of Adhesives in Bonded Joints

ASTM D5041 test method covers the determination of fracture strength in cleavage of adhesive bonds when tested on standard reinforced plastic specimens and under specified conditions of preparation and testing.

It describes the fracture strength testing of flat adhesively bonded reinforced plastic specimens. It involves imposing controlled cleavage stresses to split apart the specimen using a movable wedge.

ASTM D6862 90 Degree Peel Resistance Test of Adhesives –

ASTM D6862 test method covers the determination of the resistance-to-peel strength of an adhesive bond between one rigid adherend and one flexible adherend when tested at an angle of approximately 90 degrees under specified conditions of preparation and testing.

A variation in thickness of the adherends will generally influence test values. For this reason, the thickness of the adherends used to make the test specimens shall be specified in the material specification. When no thickness is specified, the flexible adherend shall be 0.60 mm (0.025 in.) thick and the rigid adherend shall be 1.60 mm (0.060 in.) thick.

ISO 10123 Determination of shear strength of anaerobic adhesives using pin-and-collar specimens –

ISO 10123:2013 Adhesives — Determination of shear strength of anaerobic adhesives using pin-and-collar specimens

ISO 10123 applies to anaerobic curing liquid adhesives used for locking and sealing threaded fasteners and to other adhesives. These adhesives cure without being dependent on exposed air. ISO 10123 defines a test method to assess this material in a way that is similar to the shear stresses that threads are exposed to in their regular environment, but with defined surface areas to make shear strength calculations straightforward. The common name of this technique is the pin-and-collar method.

ISO 29862 Tape adhesion peeling test, Self adhesive tapes –

ISO 29862 tape adhesion test, Self adhesive tapes - determination of peel adhesion

ISO 29862 specifies a series of methods for the determination of peel adhesion properties of self adhesives tapes.

ISO 29862 test methods include:

— Method 1: Self adhesive tapes – Measurement of peel adhesion from stainless steel at an angle of 180°;

— Method 2: Self adhesive tapes – Measurement of peel adhesion from its own backing at an angle of 180°;

— Method 3: Self adhesive tapes – Measurement of peel adhesion of double-sided and transfer tapes at an angle 180°;

— Method 4: Self adhesive tapes – Measurement of adhesion of the liner to an adhesive tape at an angle of 180°.

ISO 8510-2 Adhesives 180 degree peel test for flexible-bonded-to-rigid test specimen assembly –

ISO 8510-2: Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly Part 2: 180° peel.

ISO 8510-2 specifies the 180-degree peel adhesion test for evaluating the adhesive peel strength of bonded materials. This standard is essential in industries such as packaging, medical devices, electronics, and adhesives, where strong and reliable adhesion is crucial. The test provides critical insights into the performance and durability of adhesives by measuring the force required to separate a flexible adherend from a rigid adherend under controlled conditions.

Testing Procedure:

The rigid adherend is clamped into the machine’s fixed grip.

The flexible adherend is clamped into a self-aligning grip.

The machine applies force parallel to the bonded plane, pulling the flexible adherend at a 180-degree angle.

ISO 11339 T-peel test for Adhesives –

ISO 11339 Adhesives — T-peel test for flexible-to-flexible bonded assemblies.

It specifies a T‑peel test for the determination of the peel resistance of an adhesive by measuring the peeling force of a T‑shaped bonded assembly of two flexible adherends. The ISO 11339 test method is suitable for self-adhesive tapes that are prepared under the relevant guidelines within this test standard. For a T-peel test for a flexible-to-flexible assembly, the force is applied to the unbonded ends of the specimen . The angle between the bond line and the direction of the applied force is not fixed.

ISO 13007-4 flexural and compression test of Ceramic tiles Grouts and adhesives –

ISO 13007-4 Ceramic tiles — Grouts and adhesives Part 4: Test methods for grouts

EN 13888-2: Grouts for ceramic tiles - Part 2: Test methods

ISO 13007-4 standard describe the methods for determining characteristics for grouts used in internal and external installation of ceramic tiles. These standard specifies the methods for determining characteristics for grouts used in internal and external installation of ceramic tiles.

The strength test for ceramic tiles grouts involves several methods to determine their performance characteristics.

Test methods:

- Determination of flexural and compressive strength;

- Determination of water absorption;

- Determination of shrinkage;

- Determination of resistance to abrasion;

- Determination of chemical resistance.

Frequently Asked Questions

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Our operating systems generally support English. However, we can also offer Russian and other languages upon request based on your specific needs.
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Our testing machines are packed in standard export wooden boxes and will not be damaged. We have delivered many test machines abroad by sea or air without damage.
How about your warranty?

Usually, our warranty period is 12 months. During the warranty period, we can provide technical support and parts replacement. We can provide you with lifelong technical support.
Do you accept customized services?

Yes, of course, we can not only provide standard machines but also customized instruments according to your requirements and related testing standard.
Calibration certificate along with the machine will be provided or not?

Yes, all testing machine have our company UnitedTest signed and stamped calibration certificate. If third party certificate from CNAS Lab, need extra cost. please check CNAS website, this top Chinese National Accreditation Committee for Conformity Assessment. https://www.cnas.org.cn/english/index.html

Main application field

Application Materials

1, Adhesives/Sealants

This test is applicable to almost all types of adhesives and sealants used in engineering:

Structural adhesives: Epoxy adhesives, polyurethane structural adhesives, acrylic structural adhesives, phenolic resin adhesives (for high-strength bonding scenarios).

Non-structural adhesives: Pressure-sensitive adhesives, hot-melt adhesives (for low-load bonding).

Sealants: Silicone sealants, polysulfide sealants, modified silane sealants (focus on evaluating the bonding shear performance while ensuring sealing performance).

2, Adherends

The test covers various substrate materials bonded by adhesives/sealants:

Metals: Carbon steel, aluminum alloy, titanium alloy, stainless steel (the most commonly tested adherends, requiring strict surface treatment such as degreasing, sandblasting, and anodizing).

Composites: Carbon fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP) (widely used in aerospace and automotive fields).

Non-metals: Engineering plastics (PC, ABS, PA), wood, ceramic, and glass (need to select matching adhesives to avoid interface failure).

Application Fields

The test results directly guide the selection, optimization, and quality control of adhesives/sealants in key industries:

Aerospace: Evaluate the shear performance of adhesives for bonding aircraft structural parts (wing panels, fuselage sections), engine components, and interior parts. It ensures that the bonded joints can withstand extreme conditions such as high altitude, temperature cycling, and vibration.

Automotive Industry: Test the bonding reliability of automotive body panels, chassis components, battery packs (new energy vehicles), and windshield adhesives. It helps reduce vehicle weight and improve collision safety.

Construction Engineering: Assess the shear performance of sealants/adhesives for curtain wall bonding, door and window sealing, and precast concrete component assembly. It ensures the structural stability and waterproof sealing effect of buildings.

Electronics & Electrical Engineering: Evaluate the bonding shear strength of adhesives for electronic component encapsulation, circuit board assembly, and battery cell bonding. It meets the miniaturization and high-reliability requirements of electronic products.

Rail Transit: Test the adhesives for bonding train car bodies, interior decorations, and track components. It adapts to the long-term vibration and temperature variation of rail vehicles.